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Dark Energy and the Cosmic Microwave Background Radiation [PDF]
Physical Review Letters, 2000 We find that current cosmic microwave background anisotropy data strongly constrain the mean spatial curvature of the Universe to be near zero, or, equivalently, the total energy density to be near critical-as predicted by inflation. This result is robust to editing of data sets, and variation of other cosmological parameters (totaling seven, including
Lloyd Knox, Scott Dodelson
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Cosmic Microwave Background Radiation
Reviews of Modern Physics, 1999Most astronomers and physicists now believe that we live in an expanding universe that evolved from an early state of extremely high density and temperature. Measurements of the spectrum and anisotropy of the cosmic microwave background radiation (CMBR) provide strong evidence supporting this picture. Today, the spectrum of the CMBR matches that of a 2.
David R. Wilkinson, Lyman A. Page
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Generalized Chaplygin gas and cosmic microwave background radiation constraints
, 2003We study the dependence of the location of the cosmic microwave background radiation peaks on the parameters of the generalized Chaplygin gas model, whose equation of state is given by $p=\ensuremath{-}A/{\ensuremath{\rho}}^{\ensuremath{\alpha}},$ where ...
M. C. Bento, O. Bertolami, A. A. Sen
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Small-scale primordial magnetic fields and anisotropies in the cosmic microwave background radiation
, 2013It is shown that small-scale magnetic fields present before recombination induce baryonic density inhomogeneities of appreciable magnitude. The presence of such inhomogeneities changes the ionization history of the Universe, which in turn decreases the ...
K. Jedamzik, Tom Abel
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Polarization of the cosmic microwave background radiation
Pramana, 1999In re-ionized models, the measurement of polarization of CMBR can be a good criterion to narrow down the parameter space for cosmological models. A Vishniac-type effect in second order polarization over arc minute scales has been calculated. It has been shown that while the effect is very small (∼10−2 µK) for CDM models, it can be ...
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Discovering Relic Gravitational Waves in Cosmic Microwave Background Radiation
, 2007The authority of J.A. Wheeler in many areas of gravitational physics is immense, and there is a connection with the study of relic gravitational waves as well. I begin with a brief description of Wheeler’s influence on this study.
L. Grishchuk
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STOCHASTIC STABILIZATION OF THE COSMIC MICROWAVE BACKGROUND RADIATION
The Tenth Marcel Grossmann Meeting, 2006Photon trajectories in models of the Universe that have constant negative spatial curvature are exponientially unstable. We demonstrate that they can be stabilized by additional randomm fluctuations in the curvature. The mechanism is analogous to the one responsible for stabilizing the stochastic Kapitza pendulum, We discuss the consequences for the ...
Dettmann, CP, Keating, JP, Prado, SD
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Interpretation of observed cosmic microwave background radiation
Nature, 1977It is argued that the 'surface of last scattering' of the observed microwave background radiation corresponds to the distribution of dust in galaxies or protogalaxies with a temperature of about 110 K at the epoch corresponding to Z roughly equal to 40.
Asoka Mendis, Hannes Alfvén
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, 1993
We detect anisotropy in celestial radiation at degree angular scales between 26 and 36 GHz. The fluctuations have the spectral index of the cosmic microwave background radiation. The rms amplitude, Δ rms , of the fluctuations in the data set is 33 -9 +10
Edward J. Wollack +4 more
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We detect anisotropy in celestial radiation at degree angular scales between 26 and 36 GHz. The fluctuations have the spectral index of the cosmic microwave background radiation. The rms amplitude, Δ rms , of the fluctuations in the data set is 33 -9 +10
Edward J. Wollack +4 more
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The cosmic microwave background radiation and cosmology
Classical and Quantum Gravity, 1994I review recent observational results on the fundamental properties of the cosmic microwave-background radiation, with special emphasis on the findings of the COBE satellite. These include the present temperature of the radiation, , and the first convincing detection of angular variations in its intensity, at a level on scales .
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